Lock.



W. E. SPARKS.

LOCK. APPLICATION FILED JUNE 23. 1914.

1,137,803. Patented May 4, 1915.

1H5 NORRIS PETERS c0. PHOTO-LITHO.v WASHINGTON. D. c.

WILLIAM E. COMPANY,

SPARKS, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SABGENT 86 OF NEW HAVEN,CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Specification of Letters Patent.

Patented May 4, 1915.

Original application filed November 29, 1913, Serial No. 803,724.Divided and. this application filed June 23,1914. Serial No. 846,802.

To all whom it may concern Be it known that I, WILLIAM E. SPARKS, acitizen of the United States, residing in the city and county of NewHaven and State of Connecticut, have invented certain new and usefulImprovements in Locks, of which the following is a full, clear, andexact description. I

This invention relates to looks, and more particularly to master-keyedcylinder locks of the type described in my application, Serial No.803,724, filed November 29, 1913, of which the present application is adivision.

One of the objects of the invention is the provision of a cylinder lockwhich permanently carries a plurality of rollbacks, one of suchrollbacks being displaced relative to the other by one of the keyswithout be in so displaced by another key.

rdinarily, the change key and the emergency key will both rotate the dogor rollback connected to the rear end of the key plug, which dog orrollback is in a position to engage one part of the latch or lookmechanism in a mortise lock with which the cylinder lock is associated.The rollback connected to the key plug may be called the regular orprimary rollback. In addition to this primary rollback, there is asecond or auxiliary rollback, forming a. permanent part of the cylinderlock, which is normally so positioned relative to a part of the latch orlook mechanism as to be incapable of actuating the same, but which ismoved into operative position relative to said part when the emergencykey is inserted into the keyway, without being so moved when the changekey is inserted into the keyway. Thus, the change key actuates only onerollback in an operative manner, and one part of the latch or lookmechanism, while the emergency key actuates a plurality of rollbacks inan operative manner, and the corresponding parts of the latch or lookmecha nism.

To these and other ends, the invention consists in the novel featuresand combinations of parts to be hereinafter described and claimed.

In the accompanying drawing, Figure 1 is a fragmentary section of amortise lock equipped with my improvements, showing the change keyinserted into the cylinder lock. Fig. 2 is a similar view, showing theemergency key inserted into the cylinder lock. Fig. 3 is a rear endelevation of the cylinder lock and the associated parts of the mortiselock mechanism, showing the rollbacks in one position. Fig. 4: is asimilar view showing the rollbacks in another position, and Fig. 5 is asection on line 5-5 of Fig. 2.

Referring to the drawing, the case 10 of the mortise lock containscertain lock mech anism which may be similar to that illustrated anddescribed in the parent application, Serial No. 803,721, which mechanismincludes two tumblers 11 and 12 located in different planes. A cylinderlock 13 secured to the lock case in the usual manner comprises a case14, a key plug 15 rotatable therein, a sleeve 16 surrounding the keyplug, and the usual pin tumblers 17 cooperating with the key plug andsleeve in the well known manner. In the form shown a dog or rollback 18is rotatably mounted on the rear end of the cylinder lock to turn on theaxis of the sleeve 16, and said dog or rollback is operated by anoperator 19 secured to the rear end of the key plug by screws 20, (shownin Fig. 5, but omitted in Figs. 3 and 4) said rollback and operatorhaving substantially the same arrangement described in Letters PatentNo. 1069731, granted to Sargent & Company, on August 12, 1913, asassignee of John H. Shaw. In

the broader aspects of the invention, however, the particulararrangement of the regular or primary rollback 18 with respect to thecylinder lock is immaterial. The sleeve 16 may be omitted, and therollback 18 may be directly secured to the key plug.

A slide 21 located in the rear end portion of the keyway carries anauxiliary dog or rollback 22. This auxiliary rollback is prefen ablylocated back of the primary rollback, viz. at the extreme rear of thecylinder lock, and it forms a permanent part of such lock, and isadapted to be shifted relative to the primary rollback by the emergencykey without being so shifted by the change key.

The primary rollback 18 is arranged in the plane of the tumbler 11, andwhen rotatedis adapted to operate said tumbler. The auxiliary rollback22 is normally positioned in'operatively with respect to the tumbler 12,but when the emergency key is inserted into the lock said auxiliaryrollback when turned will actuate the tumbler 12.

The slide 21 is acted on by a spring 23, which end 24 will take into acorrespondinglyshaped recess 25 at the inner edge of the slide 21 insuch a manner that the slide and its rollback 22 will not be shiftedrelative to the primary rollback. The emergency key 26, however, isprovided at its inner end with a squared off portion 26 adapted to comein contact with the inner edge of the slide '21 in such a manner as tomove the slide and its rollback 22 rearwardly in opposition to thespring 23 so that the auxiliary rollback will be in a position toactuate the tumbler 12 When said rollback is turned, as shown in Fig. 2.In this manner,

the emergency key will actuate both tumblers 11 and 12 by operation of-both rollbacks 18 and 22, whereas the change key being incapable ofpositioning the auxiliary rollback op'eratively with respect to itscorresponding tumbler, will only actuate the tumbler 11 by means of theregular or primary rollback.

When the emergency key is withdrawn from the cylinder lock the spring 23carries the auxiliary rollback from the position shown in Fig. 2 to theposition shown in Fig.1.

In the particular form of my invention which I have selected forillustration, the auxiliary rollback carried by the cylinder lock isarranged to slide rearwardly relative to the primary rollback when theemergency key is inserted into the look, but the particular direction ofmovement of the movable rollback relative to the fixed rollback isimmaterial in the broad aspects of the invention. Various changes inthese and other respects may be adopted without digressing from myinventive idea as expressed in the claims.

What I claim is:

1. A cylinder lock having two rollbacks, and two keys for said lock, oneof said rollbacks being displaced relative to the other by the insertionof one of said keys without being so displaced by the insertion of theother key; substantially as described.

2. A cylinder lock having a key plug, a rollback connected to said keyplug, a change key and an emergency key for operating said rollback and,an auxiliary rollback 'carried by the cylinder. lock, and displaceablerelative to said first rollback by the emergency key only; substantiallyas described.

3. A cylinder lock having a key plug, a rollback connected to the rearend of said key plug, an auxiliary rollback, a plurality ofv keys, andmeans supporting said auxiliary rollback from said cylinder lock, andproviding for movement thereof relative to the first rollback byengagement with one of said keys; substantially as described( 4. Acylinder lock having a key-engaging 'member at the rear end of thekeyway, and

a dog or rollback carried by said member; substantially as described.

v 5. A cylinder lock having a key-engaging slide at the rear end of thekeyway, and a dog or rollback carried by said slide; substantially asdescribed. 7

6. A cylinder lock having a'key-plug, a rollback connected to said keyplug, a keyeng'agi'ng slide projecting into the keyway of said key plug,and an auxiliary rollback carried by said slide, and movable relative tosaid first rollback; substantially as described.

7 A cylinder lock having two rollbacks, two keys, one of said rollbacksbeing theplaceable relative to the other by one of said keys, and meansfor returning the displaceable rollback to its initial" position whenthe last named key is withdrawn from the keyway; substantially asdescribed.

8. A cylinder lock having a primary rollback, an auxiliary rollback, amovable member carryir 1gv said auxiliary rollback and pro ecting intothe keyway, and means for normally holding said auxiliary rollback in adefinite position relative to the pr-imary rollback; substantially asdescribed.

9. A cylinder lock having a primary roll- 7 back, an auxiliary rollback,a slide carrying said auxiliary rollback, movable with reference tosaid, primary rollback, and a' spring acting on said slide,substantially as described.

10. A cylinder lock having aprimary rollback, an auxiliary rollback, anda movable key-engaging member carrying said auxiliary rollback;substantially as described.

11. In a cylinder look, a memberin the rear end of the keyway adapted tobe projected rea'rwardly by'a key, and a rollback engagement with atleast one of said keys,

and a dog or rollback carried by said member, and adapted to beprojected from the rear end of said lock; substantially as described. Y

carried by said member and movable there- 13. A cylinder lock having aplurality of rollbacks bodily displaceable relative to each other by theinsertion of a key; substantially as described.

1%. A cylinder lock having a plurality of rollbacks carried thereby andforming permanent parts thereof,said rollbacks bodily displaceablerelative to each other by the insertion of a key; substantially asdescribed.

15. A cylinder lock having a plurality of rollbacks carried thereby andforming permanent parts thereof, one of said rollbacks being movablebodily relative to another, and means yieldingly holding said movablerollback in a predetermined position; substantially as described.

16. A cylinder lock having a plurality of rollbacks, one of saidrollbacks bodily movable relative to another, and having a Copies ofthis patent may be obtained for five cents each, by addressing thecarrying part projecting into the keyway; substantially as described.

17. A cylinder lock having a bodily movable rollback, and a carrier forsaid rollback projecting into the keyway; substantially as described.

In Witness whereof, I have hereunto set my hand on the 17th day of June,1914.

WILLIAM E. SPARKS.

Witnesses:

ALBERT A. PAGE, WILLIAM G. HAFNER, Jr.

Commissioner of Patents,

Washington, D. 0.

